Leaders of rebellious individuals orchestrate turmoil and anarchy (4)
I believe the answer is:
riot
'anarchy' is the definition.
(thesaurus)
'leaders of rebellious individuals orchestrate turmoil' is the wordplay.
'leaders of' indicates taking the first letters.
The initial letters of 'rebellious individuals orchestrate turmoil' is 'RIOT'.
'and' acts as a link.
(Other definitions for riot that I've seen before include "Lavish display (of colour)" , "unrestrained revelry" , "Run amok" , "A public disturbance by crowd" , "Affray, fighting in the streets" .)